Speculations on the ethology of some heteromorph ammonites

Autor:	Mikheil V. Kakabadze
Rok vydání:	2015
Předmět:	0106 biological sciences 010506 paleontology Far distance Aperture (mollusc) Shell (structure) Paleontology Ethology Biology 010603 evolutionary biology 01 natural sciences Seafloor spreading Demersal zone Colchicone 0105 earth and related environmental sciences
Zdroj:	Swiss Journal of Palaeontology. 135:63-68
ISSN:	1664-2384 1664-2376
Popis:	The mode of life of the turricones and colchicones are considered against the background of functional–morphological analyses of their shell modifications during ontogeny. Among turricones, there were more or less differently adapted (nektobenthos, planktobenthos, demersal) habitants. In colchicones transformation from helical to planispiral coiling indicates a transition to a more active, free-swimming mode of life. At the adult stage, with U-shaped shaft–hook morphology, colchicones could passively float or migrate up and down, not in far distance from the seafloor in a near-vertical position of the shaft, with the aperture facing upward. Though, they were able to maneuver and change the orientation of the shell to establish contact with the substrate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::67a10155f6ccde6c20e8946adcba7e3b https://doi.org/10.1007/s13358-015-0104-z Zobrazit plný text záznamu Full text from SpringerLink